Lumen Migration Schema for MongoDB

Solution:

Use following code

/** Run the migrations.
 *
 * @return void
 */
public function up()
{        
    Schema::connection($this->connection)
    ->table('actions', function (Blueprint $collection) 
    {
        $collection->index('name');
    });
}

/**
 * Reverse the migrations.
 *
 * @return void
 */
public function down()
{
    Schema::connection($this->connection)
    ->table('actions', function (Blueprint $collection) 
    {
        $collection->drop();
    });
}

Src: https://github.com/jenssegers/laravel-mongodb/issues/859